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a)
Interpretation:
The given equation is the prediction based on Le-Chatelier’s principle about the shift in equilibrium with temperature has to be interpreted.
Concept introduction:
Law of mass action: The
Van’t Hoff equation: the change in equilibrium constant,
Clausius-Claypeyron equation:
a)
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Explanation of Solution
Let’s write the Van’t Hoff equation at two different temperatures:
At
At
Taking the difference between two equations,
Assuming an endothermic reaction,
b)
Interpretation:
The molar heat of vaporization of water has to be calculated.
Concept introduction:
Law of mass action: The rate of
Multiple equilibria: If a reaction can be expressed as the sum of two or more reactions, the equilibrium constant for the overall reaction is given by the product of the equilibrium constants of the individual reactions.
The equilibrium constant for two separate equilibrium constants are,
For overall reaction, the equilibrium constant
Therefore,
Van’t Hoff equation: the change in equilibrium constant,
Clausius-Claypeyron equation:
b)
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Explanation of Solution
For the given reaction,
The given reaction is
Rearranging
Given:
Substituting given value into the derived Van’t Hoff equation as,
Therefore, the molar heat of vaporization of water is
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Chapter 15 Solutions
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